The app simply puts itself in a position where you have a choice to allow it to control whether or not your device goes into lock screen mode. In other words, you can prevent it from going to lock screen while you're doing one of the longer meditations if you allow it to administrate that. It does nothing else and can't do anything else. If you don't have the check box checked then it can't even do that and your device will go to lock mode normally based on your default settings. Thus, if you set your device to time out before the meditation is over, this is a way to override it JUST for this app. It's simply a way that you can have the device time out to lock screen overridden while you're using the app if you wanted to. It is not malicious, it's actually quite helpful because it allows the app to control the lock screen independently of your settings. An example: Say you have it set for 1 minute before your device sleeps and you choose to use a lock screen to wake it back up. Well, if you are watching the app video while meditating you don't want that to happen do you? This allows you to override that for this one app only. And even then only if you want to.